crypto/des/asm/desboth.pl

   1 #! /usr/bin/env perl
   2 # Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9
  10 $L="edi";
  11 $R="esi";
  12
  13 sub DES_encrypt3
  14         {
  15         local($name,$enc)=@_;
  16
  17         &function_begin_B($name,"");
  18         &push("ebx");
  19         &mov("ebx",&wparam(0));
  20
  21         &push("ebp");
  22         &push("esi");
  23
  24         &push("edi");
  25
  26         &comment("");
  27         &comment("Load the data words");
  28         &mov($L,&DWP(0,"ebx","",0));
  29         &mov($R,&DWP(4,"ebx","",0));
  30         &stack_push(3);
  31
  32         &comment("");
  33         &comment("IP");
  34         &IP_new($L,$R,"edx",0);
  35
  36         # put them back
  37
  38         if ($enc)
  39                 {
  40                 &mov(&DWP(4,"ebx","",0),$R);
  41                  &mov("eax",&wparam(1));
  42                 &mov(&DWP(0,"ebx","",0),"edx");
  43                  &mov("edi",&wparam(2));
  44                  &mov("esi",&wparam(3));
  45                 }
  46         else
  47                 {
  48                 &mov(&DWP(4,"ebx","",0),$R);
  49                  &mov("esi",&wparam(1));
  50                 &mov(&DWP(0,"ebx","",0),"edx");
  51                  &mov("edi",&wparam(2));
  52                  &mov("eax",&wparam(3));
  53                 }
  54         &mov(&swtmp(2), (DWC(($enc)?"1":"0")));
  55         &mov(&swtmp(1), "eax");
  56         &mov(&swtmp(0), "ebx");
  57         &call("DES_encrypt2");
  58         &mov(&swtmp(2), (DWC(($enc)?"0":"1")));
  59         &mov(&swtmp(1), "edi");
  60         &mov(&swtmp(0), "ebx");
  61         &call("DES_encrypt2");
  62         &mov(&swtmp(2), (DWC(($enc)?"1":"0")));
  63         &mov(&swtmp(1), "esi");
  64         &mov(&swtmp(0), "ebx");
  65         &call("DES_encrypt2");
  66
  67         &stack_pop(3);
  68         &mov($L,&DWP(0,"ebx","",0));
  69         &mov($R,&DWP(4,"ebx","",0));
  70
  71         &comment("");
  72         &comment("FP");
  73         &FP_new($L,$R,"eax",0);
  74
  75         &mov(&DWP(0,"ebx","",0),"eax");
  76         &mov(&DWP(4,"ebx","",0),$R);
  77
  78         &pop("edi");
  79         &pop("esi");
  80         &pop("ebp");
  81         &pop("ebx");
  82         &ret();
  83         &function_end_B($name);
  84         }
  85
  86